He said this "the Russians both made more sacrifices, and did more harm to the nazis than the usa."
The Russians didn't make any sacrifices because a sacrifice requires choice. The Nazis invaded Russia and were hellbent on destroying communism. The Russians had no choice but to fight. Winter weather was the primary reason for the Nazi retreat. Sacrifice is what the Americans and Canadians did. A farm boy in Iowa was under no direct threat from the Axis powers but millions like him went to fight. Without the Americans WWII would have taken much longer and it would have probably been won by the Axis powers. Remember, Russia was not fighting Japan. Without the US occupying them in the Pacific, they would have been free to attack whomever they chose.